Fix broken TEST_DEPENDS. TEST_DEPENDS has been fixed as per below information from mat.
"Unless what was in TEST_DEPENDS is used for anything else that testing the module (aka in the "t" directory) it must stay as TEST_DEPENDS, and not be added to BUILD_DEPENDS."
Differential Revision: https://reviews.freebsd.org/D1403
Submitted by: mat
Approved by: xxxx(mentor)